Trolley-wheel.



I PATENTED JUNE so, 1908. R. P. STARK & c. R. KLINGENSMITH. TROLLEYWHEEL.

APPLICATION FILED APB. 23, 1907.

Aflorng/s UNITED srArEs PATENT OFFICE.

ROBERT P. STARK AND CHARLES R. KLINGENSMITH, OF CREIGHTON, PENNSYLVANIA.

TROLLEY-WHEEL.

Specification of Letters Patent.

Patented June 30, 1908.

Application filed April 23, 1907. Serial No. 369,809.

To all whom it may concern:

Be it known that we, ROBERT P. STARK and CHARLES R. KLINGENsMITH,citizens of the United States of America, residing at Creighton, in thecounty of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Trolley-Wheels, of which the following is a speeification, reference being had therein to the accompanying drawing.

This invention relates to trolley wheels, and the invention has for itsobject to provide a novel wheel wherein the bearing bushing can beeasily and quickly renewed when the same has become worn, cracked orotherwise injured.

Another object of this invention is to provide a detachable bearingbushing for trolley wheels provided with spirally arranged grooves forconveying a lubricant to the bearing surfaces of a trolley harp spindle,upon which the wheel is journaled.

A further object of this invention is to provide a strong and durabletrolley wheel adapted to reduce the expense of maintenance in connectionwith an electric railway.

With the above and other objects in view, the invention consists in thenovel construction, combination and arrangement of parts to behereinafter more fully described and then specifically pointed out inthe appended claims.

Referring to the drawing forming part of this specification, likenumerals of reference designate corresponding parts throughout theseveral views, in which:

Figure 1 is a side elevation of a trolley wheel constructed inaccordance with our invention, Fig. 2 is a vertical sectional view ofthe same, Fig. 3 is a side elevation of a trol ley wheel illustrating aslight modification of our invention, Fig. 4 is a vertical sectionalview of the same, Fig. 5 is a perspective view of a bearing bushing usedin connection with the trolley wheel.

To put our invention into practice, we con struct a substantiallyrectangular bearing bushing 1 having cylindrical ends 1. The bushing 1has its bore 2 provided with spiral grooves 3. The bushing isconstructed of bronze, or durable metal, capable of with standingconsiderable friction without wearing. The bushing 1 is mounted in therectangular opening 1 of a circular wheel body 5, said body having aperipheral groove 6 to receive a trolley wire. The body 5 is cut away,as at 7, to save material and reduce the weight of the wheel.

To retain the bushing 1 in the wheel body 5 two side plates are providedeach of which consists of a centrally-(lisposed circular portion 7 fromwhich project a series of arms 12, these arms 12 tern'iinating in therim portion 8. The central portion 7 is formed with a circular opening141 to receive the cylindrical ends 1 of the bushing 1, and when in suchposition the flattened portion 1 at each end of the bushing 1 abutsagainst the inner face of a side plate as clearly shown in Fig. 1. Thewheel body 5 and side plates are secured together through the medium ofa plurality of headed bolts and nuts 11, thebolts ex tending through thearms 12 of the side plates, owing to the plates extending over the endsof the bushing 1, said bushing will be prevented from becomingdisengaged from the trolley wheel until said plates are removed.

The circular wheel body 5 is provided with a radially disposed port 15ada )ted to communicate with a similar port 16 formed in the bushing 1,these ports being employed to convcy a lubricant to the spiral grooves3. The ports are normally closed by a threaded plug 17 mounted in theport 15.

In Figs. 8 and 4 of the drawing, we have illustrated a slightmodification of our inven tion, wherein the cut away portions of thecircular wheel body and side plates are dis pensed with, said body andplates being made of solid material to provide a more substantialtrolleywheel. Since the cut away portions are dispensed with, we find itnecessary to rovide one of the plates 8 with an angular ydisposed port15 communicating with a similar port 16 formed in the bushing 1, saidports being closed by a threaded plug 17. These ports serve functionallythe same purpose as the ports 15 and 16 previously described.

It will be apparent from the novel construction of our im roved trolleywheel that when the bushing ecomes worn or injured that it is notnecessary to discard the entire wheel, the side plates 8 being removedand a new bushing placed within the circular wheel body 5.

We do not care to confine ourselves to the metal from which the variousparts of the trolley wheel are constructed, or to the size or proortion.

no '1 other changes in the minor details of construction, as arepermissible by the appended claims may be resorted to without epartingfrom the spirit and scope of the invention.

WVhat we claim and desire to secure by Letters Patent, is

A trolley wheel comprising a rectangular hollow bushing having each endformed with a cylindrical offset, each of said 'oflsets of a diameter asto form on that end of the boss from which the offset projects a widemarginal portion extending entirely around the offset, said bushinghaving its inner face provided with spiral grooves, a solid wheel body lhaving a centrally-disposed square opening,

said body mounted upon said bushing and of a width equal to therectangular ortion of the bushing, whereby the length of the bearingsurfaces of the Wheel body upon the rectangular portion of the boss,will be the same as the length of said rectangular portion, a pair ofside plates of the same diameter as the wheel body, each of said platesembodying a centrally-dis osed circular portion provided with a circu aropening, whereby said plate can be mounted uIpon an offset and bearagainst the margina portion which surrounds the offset, each of saidlates further embodying a circular rim, an arms connecting the rim withthe central portion, the inner face of each of said central portionsbeing uninterrupted from the edge of the circular opening to the outeredge of the portion, said c1rcular portions arms and rims bearingdirectly against the opposite faces of the wheel body thereby preventinglateral movement of the wheel body in either direction, bolts extendingthrough the arms of the plates and said wheel body for connecting theplates and the Wheel body together, nuts mounted upon the ends of thebolts, said nuts fixedly securing the wheel body and lates together,said bushing further provi ed with an inclined port communicating withone of said grooves, and the circular portion of one of said platesprovided with an inclined port communicating with the inclined port ofthe bushing, combined with a plug for closing the outer end of that portwhich is formed in said circular portion. i

In testimony whereof we aifix our signatures in the presence of twowitnesses.

ROBERT P. STARK. CHARLES R. KLINGENSMITH.

Witnesses:

MAX H. SROLOVITZ, O. V. BROOKS.

